坚固性
垂直轴风力涡轮机
翼型
空气动力学
风洞
涡轮机
升力系数
Lift(数据挖掘)
扭矩
叶尖速比
机械
压力系数
风梯度
结构工程
高超声速风洞
阻力系数
风力发电
阻力
工程类
物理
航空航天工程
风廓线幂律
电气工程
计算机科学
雷诺数
数据挖掘
热力学
湍流
程序设计语言
作者
Qingan Li,Takao Maeda,Takumi Kawaguchi,Junsuke Murata,Kento Shimizu,Tatsuhiko Ogasawara,Alisa Nakai,Takuji Kasuya
标识
DOI:10.1016/j.renene.2016.05.054
摘要
The prediction of aerodynamic forces around straight-bladed Vertical Axis Wind Turbines (VAWT) is important for wind turbine applications. This paper focused on evaluating the aerodynamic forces acting on a single blade, depending on the different numbers of blades in wind tunnel experiments. In this study, numbers of blades were from two to five and the cross-sectional shape of the tested airfoil was a NACA0021. Firstly, the power coefficient was measured by a torque meter and a six-component balance. Secondly, pressures acting on the surface of rotor blades were measured during rotation by multiport pressure devices. Then, the evolutions of normal coefficient, tangential coefficient and lift-to-drag ratio CL/CD, which were obtained from pressure distributions, were discussed. Finally, the power coefficients calculated by pressure distributions were compared with the experiment data of the torque meter and the six-component balance. The results showed that the pressure difference substantially decreased with the increase of solidity. In addition, the values of six-component balance and torque meter showed smaller values than those calculated by pressure distributions. In words, these results provided theoretical significance towards the development of a simple design for straight-bladed VAWT.
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